$ 2000 - Kenyalnd<jfl!s'a*Thalland Sudan » • India »Cc • Philippines , Iran • •Toiwnn Iraq ° »UAR • Japan • Venatui 10 20 30 40 50 60 70 PERCENT OF POPULATION IN URBAN AREAS Figure 2. Per capita GNP and percent of population in urban Source: Table 3. nature of the fuels used, the equipment used in their consum] local airshed conditions. Whatever the sources, air pollution crease with great rapidity. Pure Water Pure water has long been recognized as a kind of resource z tion agriculture, and some mining areas have faced problem supply and potability. Today water is a resource of increasin populations grow, cities become larger and more densely pi water-polluting industries multiply.-borne diseases.